High-magnetic-induction high-frequency nanocrystalline soft magnetic alloy and preparation method thereof

A nanocrystalline soft magnetic, high magnetic induction technology, applied in the manufacture of inductors/transformers/magnets, magnetic objects, magnetic materials, etc., can solve the problem of low magnetic anisotropy, low magnetic permeability, high coercivity, high magnetic It can solve problems such as poor frequency soft magnetic performance, and achieve the effect of broadening the product market and application prospects, optimizing high-frequency performance, and excellent high-frequency performance.

Active Publication Date: 2022-05-13
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanocrystalline alloy has low magnetic anisotropy, high magnetic permeability and low coercive force, but the saturation magnetic induction of the standard composition is only 1.24T, which needs to be further improved
[0006] The Chinese patent document with the publication number CN112877615A discloses a FeSiBCuPC nanocrystalline alloy system, which obtains high saturation magnetic induction intensity by using high Fe content, and solves the problem of high Fe content alloy system by adding Si, B, Cu, P, C elements and optimizing the content. The problem of low amorphous formation ability and limited thickness and width of the strip
However, the problem of high magnetic anisotropy has not been solved, and the high-frequency soft magnetic properties are poor, and the application range is limited

Method used

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  • High-magnetic-induction high-frequency nanocrystalline soft magnetic alloy and preparation method thereof
  • High-magnetic-induction high-frequency nanocrystalline soft magnetic alloy and preparation method thereof
  • High-magnetic-induction high-frequency nanocrystalline soft magnetic alloy and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0035] In the present embodiment, the molecule of iron-based nanocrystalline soft magnetic alloy material is Fe 76 Si 11 B 8 Nb 2 Cu 1 Mo 1 P 1 .

[0036] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0037] (1) Fe, Si, FeB, FeP, Cu, FeMo and FeNb of industrial purity are used as raw materials according to Fe 76 Si 11 B 8 Nb 2 Cu 1 Mo 1 P 1 A quenched amorphous strip with a width of about 60mm and a thickness of about 18μm was prepared by batching, master alloy smelting, and single-roll quenching technology, and the copper roll speed was 30m / s. Cut the strip and wind it into an iron core with a width of 10mm, an inner diameter of 19.7mm and an outer diameter of 22.6mm.

[0038] (2) to Fe 76 Si 11 B 8 Nb 2 Cu 1 Mo 1 P 1 The alloy is heat treated for nanocrystallization. The alloy strip is heated to 560°C at a heating rate of 5°C / min and kept for 0.5h, and then cooled to room temperatu...

Embodiment 2

[0043] In the present embodiment, the molecule of iron-based nanocrystalline soft magnetic alloy material is Fe 77.8 Si 10 B 8 Nb 2.6 Cu 0.6 P 1 .

[0044] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0045] (1) Fe, Si, FeB, FeP, Cu and FeNb of industrial purity are used as raw materials according to Fe 77.8 Si 10 B 8 Nb 2.6 Cu 0.6 P 1 A quenched amorphous strip with a width of about 60mm and a thickness of about 18μm was prepared by batching, master alloy smelting, and single-roll quenching technology, and the copper roll speed was 30m / s. Cut the strip and wind it into an iron core with a width of 10mm, an inner diameter of 19.7mm and an outer diameter of 22.6mm.

[0046] (2) to Fe 77.8 Si 10 B 8 Nb 2.6 Cu 0.6 P 1 The alloy is heat treated for nanocrystallization. The alloy strip is heated to 560°C at a heating rate of 5°C / min and kept for 0.5h, and then cooled to room temperature with t...

Embodiment 3

[0051] In the present embodiment, the molecule of iron-based nanocrystalline soft magnetic alloy material is Fe 77 Si 12 B 7 Nb 2 Cu 1 P 1 .

[0052] The concrete preparation method of this iron-based nanocrystalline alloy is as follows:

[0053] (1) Fe, Si, FeB, FeP, Cu and FeNb of industrial purity are used as raw materials according to Fe 77 Si 12 B 7 Nb 2 Cu 1 P 1 A quenched amorphous strip with a width of about 60mm and a thickness of about 18μm was prepared by batching, master alloy smelting, and single-roll quenching technology, and the copper roll speed was 30m / s. Cut the strip and wind it into an iron core with a width of 10mm, an inner diameter of 19.7mm and an outer diameter of 22.6mm.

[0054] (2) to Fe 77 Si 12 B 7 Nb 2 Cu 1 P 1 The alloy is heat treated for nanocrystallization. The alloy strip was heated to 580°C at a heating rate of 5°C / min for 0.5h, and then cooled to room temperature with the furnace.

[0055] (3...

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Abstract

M is one or more of Nb, Mo, V, Mn and Cr, and the molar percentage content of the elements is as follows: b is more than or equal to 6 and less than or equal to 15, c is more than or equal to 5 and less than or equal to 12, d is more than or equal to 0.5 and less than or equal to 3, e is more than or equal to 0.5 and less than or equal to 1.5, f is more than or equal to 0.5 and less than or equal to 3, and the balance of Fe and impurities. The difference value between the induced anisotropy value and the average magnetocrystalline anisotropy value is 0.1-1J / m < 3 >. The magnetically soft alloy has relatively high magnetic conductivity and relatively low magnetic loss under high frequency. The invention further discloses a preparation method of the high-magnetic-induction and high-frequency nanocrystalline soft magnetic alloy. The induced anisotropy value (Ku) and the average magnetocrystalline anisotropy value (lt; k1gt; K1gt; therefore, the high-frequency soft magnetic performance is improved.

Description

technical field [0001] The invention belongs to the technical field of iron-based nanocrystalline soft magnetic alloy materials, and in particular relates to a high magnetic induction and high frequency nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] With the rapid development of technologies such as 5G communication and wireless charging, problems such as electromagnetic interference and health hazards caused by electromagnetic wave radiation are becoming more and more serious. Soft magnetic materials are commonly used materials to suppress magnetic field interference. Due to the small skin effect and low wave impedance of low-frequency electromagnetic waves (frequency below 300kHz), the absorption and reflection loss of materials for low-frequency magnetic field radiation becomes very small, so the problem of low-frequency magnetic shielding has always been a difficult research point. High-permeability materials can conf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F41/02C22C38/02C22C38/16C22C38/12C22C38/04C22C38/34C22C38/32C22C38/20C22C38/26C22C38/22C22C38/24C22C38/38C21D6/00C21D6/04C21D1/04B22D11/06
CPCH01F1/14766H01F41/02C22C38/02C22C38/002C22C38/16C22C38/12C22C38/04C22C38/34C22C38/32C22C38/20C22C38/26C22C38/22C22C38/24C22C38/38C21D6/002C21D6/005C21D6/008C21D6/04C21D1/04B22D11/0611C22C2200/04
Inventor 黎嘉威孙宇贺爱娜董亚强
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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